package com.google.code.mochaccino.framework.crypto.cipher;

/*
 * Copyright 2012 Claude Houle claude.houle@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import javax.crypto.Cipher;

/** Block-based cipher handle ancestor class. */
public abstract class CipherHandlerBlock implements CipherHandler {

	/** The Default Block Size if the cipher does not give one. */
	private int defaultBlockSize = 16;

	protected CipherHandlerBlock( int defaultBlockSize ) {
		this.defaultBlockSize = defaultBlockSize;
	}

	public int getBlockSize( Cipher c ) {
		int size = c.getBlockSize();
		if ( size == 0 ) {
			return defaultBlockSize;
		}
		return size;
	}
}
